Well, they've just passed the six-hour mark and are still playing well. I'm testing my small "SONY SRS-A20 ACTIVE SPEAKER SYSTEM" speakers that plug into my iBook G4's headphone jack. They work without batteries, but can be amplified a lot more with four AA batteries. I'm doing an experiment with the speakers to see how long they last on fully charged Duracell AA rechargeable NiMH batteries. We'll see how long. They've been going for 6 hours, 20 minutes, so I'll stop for now and continue the test later, after some sleep time, and just add the remaining time to see how long the batteries last. I'm hoping it's at least 12 hours, but we'll see. At least it's over 6, so far.

I've always been impressed by the sound quality from these little speakers. It certainly beats the cheesy sound of the iBook G4's built-in speakers.